Engine size and capacity for the Bensport engine compared to the Peregrine.
| Identifier | ExFiles\Box 1\8\ B001_X100 Engine Chassis-page030 | |
| Date | 1st July 1932 | |
| PER BAG. 84027. Sg. {Arthur F. Sidgreaves - MD} From Hs {Lord Ernest Hives - Chair} /Gry. {Shadwell Grylls} c. to PN. {Mr Northey} c. to WOr. {Arthur Wormald - General Works Manager} c. to E. {Mr Elliott - Chief Engineer} Hs {Lord Ernest Hives - Chair} /Gry. {Shadwell Grylls} 1/MA.1.7.32. x4553 BENSPORT(Codename for 3 1/2-litre Bentley) ENGINE SIZE. The Peregrine(Experimental Bentley car never produced / Aero Engine) engine with a bore and stroke of 2.725 x 4.125 has a capacity of 2364 cc. The proposed stroke for the Bensport(Codename for 3 1/2-litre Bentley) has been reduced to 3.875 giving a capacity of 2220 cc, or 6% less than Peregrine(Experimental Bentley car never produced / Aero Engine). We consider it may be desirable that the capacity should be kept below 2300 cc. 30% is added to the capacity of supercharged engines in the regulations for road races. With a capacity of less than 2300 cc a car runs in the 3 litre class, the next class being up to 5 litres. We could however increase the bore to 2.76" to give a capacity of 2290 cc. This would increase the taxable rating by £1 above that of Peregrine(Experimental Bentley car never produced / Aero Engine). Hs {Lord Ernest Hives - Chair} /Gry. {Shadwell Grylls} | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).